Excavator-bucket extension



Nov. 8, 1927. 1,648,783

a. T. ROSSELLE EXCAVATOR BUCKET EXTENSION Filed ,Jan. 3 1926 2 Sheets-Sheet 1 Gr.T F055 eZZe IN V EN TOR.

Nmn 8, 19270 EXCAVATOR BUCKET EXTENSION RQSSELLEI Filed Jan. l926 2 Sheets-Sheet 2 IN VEN TOR.

ATTORNEW Patented Nov. 8,, TQZ'T.

unite stars rare GEORGE T. ROSSELLE, F TI FFIN, OHIO. ASSTGNOB. TO AUSTIN MACHINERY CORPORA- TION, OF MUSKEGON, MICHIGAN, A CORPORATION OF VIRGINIA.

EXCAVATOR-BUCKET EXTENSION.

Application filed January 30, 1926. Serial No. 84,936.

This invention relates to extensions for excavator buckets used on trenching machines, shovels and like excavators where it is desired to increase the Widthof the trench or out beyond the normal width of the bucket.

One of the objects of the invention is to provide an extension permitting the use of normal width and bottom of trench thereby eliminating the necessity of using specially designed teeth where extra width of.cut is desired and in which the securing means for the teeth in the extension is the same as that normally employed on'the front edge or lip of the bucket.

A further object is the provision of means utilizing certain of the pockets ordinarily provided on the bucket for mounting and rigidly securing the extensions and the teeth carried thereby.

A further object is the provision of improved extensions embodying such structural features that a plurality of them may be assembled in nested relation to increase the width of the cut to any desired degree and which will also properly break up the mate rial cut and direct the movement of such material into the bucket.

In the accompanying drawings wherein an approved embodiment of the invention is illustrated.

Fig. 1 is a fragmentary plan view of a type of excavator bucket to which the present extension is applicable.

Fig. 2 is a fragmentary plan view of the bucket showing one of the extensions in position thereon.

Fig. 3 is a side elevation of the bucket showing the extension applied.

Fig. 4 is a fragmentary plan view similar to Fig. 2 and showing two of the extensions nested to further increase the width of the cut.

Fig. 5 is an enlarged plan view of the ex- F tension detached from the bucket.

Referring to the drawing in detail the numeral 5 indicates the body of an excavating bucket provided with the usual connecting devices 6 by which the bucket is secured to the ordinary endless driving members (not shown) of an excavating machine.

The front edge or lip of the bucket is provided on its underside with a series of spaced pockets 7 receiving the shanks 8 of the cut-- ting teeth 9 which latter are secured in position by securing bolts 10 which pass through the rear walls of the pockets 7 and have nuts 11 threaded thereon. The shanks 8 are tapered so as to produce a wedging effect when the nuts 11 are screwed ,up whereby to rigidly fasten the teeth in place.

Pockets 7 identical in construction to the the same design of tooth as used for cuttingpockets 7 are arranged at the opposite sides of the bucket body and receive side teeth 9 which are also identical in construction to the teeth 9 and are interchangeable therewith.

Under normal conditions the tooth 9 inserted in the pocket 7 cuts the side of the trench but when it is desired to increase the width of the cut the tooth 9 is removed from its pocket and is replaced by the extensions shown in detail in Fig. 5. The exten sion consists of a frame 12 having apertures 13 at its rear portion receiving bolts 14 which are fitted in corresponding apertures pro vided in the side portions of the bucket 5 rearwardly of the pockets 7. The forward extremity of the frame 12 is directedangularly as indicated at 14 and carries a tooth 15 which is concave on its top face and terminates in a cutting edge 16. The angular extension 14: also carries a shank 17 of a size and shape to snugly fit the pocket 7. The same type of bolt 10 employed for. securing the teeth 9 in position is provided at the extremity of the shank 17 whereby the latter may be rigidly secured in place in the side pocket 7 of the bucket.

On the side of the frame or body 12 opposite the shank 17 is located a pocket 18 which is identical in construction to the pockets 7 and 7 and is adapted to receive the shank of a side tooth 19.

In applying the extension to excavator buckets the side teeth 9 are removed and in each side pocket 7 is inserted the shank 17 of one of the extensions and by adjustment of the nut threaded on the bolt 10 the shank is drawn rearwardly and rigidly wedged in the pocket. The rear portion of the extension frame is, rigidly fastened to the bucket body 5 by the bolts 14 and due to the spaced relation of the latter the strains imposed on the bucket are evenly distributed thereover. The shank of the side tooth 19 is next inserted in the pocket 18 and is firmly wedged in place by adjustment of the nut at the terminal of the bolt. The tooth 19, as stated is identically the same of construction. the

bucket teeth9 and 9 and hence all of the teeth are interchangeable and the tooth 9 which is removed to facilitate attachment of the extensionmay be used in the place of the tooth 19. The taper of the shanks of the teeth produces, incident to the use of the bucket a wedging effect in the pockets and hence the rigidity of the mounting of said teeth increases as the pressure imposed thereon during use increases. Likewise, due to the taper 17 of the extension the rigidity of the mounting of the latter is increased as the pressure of the material on the teeth 15 and 19 increases.

When it is desired to increase the width of cut beyond that attained by the addition of one extension, two of them may be nested together as shown in Fig. 4. In this an rangement the first extension or that one which is nearest the bucket will have the extension side teeth 19 removed therefrom and in its place the shank 17 of a second extension is inserted thus disposing the teeth of the two extensions in operative relation side by side. The extension tooth 19 removed from the first extension is inserted in the pocket 18 of the second or outermost extension. To anchor the rear extremities of the frames of the extensions in position the relatively short bolts 14, are replaced by longer bolts 20 threaded in the side walls of the bucket 5 and a spacing ele ment 21 is inserted between the two exten-- sions to maintain their frames in spaced parallel relation.

What I claim is:

1. A tooth carrying extension adapted to be mounted in a tooth receiving pocket of excavator buckets including a. body, a shank carried by the body adapted for insertion in an excavator tooth pocket and means for securing the same in position, a tooth carried by the body. and a tooth receiving pocket carried by the body.

2. A tooth carrying extension adapted to be mounted in a tooth receiving pocket of excavator buckets including a body, a shank carried by the body adapted for insertion in an excavator tooth pocket and means for securing the same in position, a' tooth carried by the body, and a tooth'receiving pocket carried by the body, and means for securing the rear portion of the extension body to an excavator bucket.

3. A tooth carrying extension adapted to be mounted in a tooth receiving pocket of excavator buckets including a body, a shank carried by the body adapted for insertion in an excavator tooth pocket and means for securing the same in position, 'a tooth carried by the body, and a tooth receiving pocket carried by the body, and a tooth removably fitted in said pocket.

4. A tooth carrying extension adapted to be mounted in a tooth receiving pocket of excavator buckets including a body, a shank carried by the body adapted for insertion in an excavator tooth pocket and means for securing the same in position, a tooth carried by the body, and a tooth receiving pocket carried by the body, said shank being tapered whereby to produce a wedging action in the excavator bucket incident to the application of pressure to said tooth as during the use of the bucket.

5. An extension as claimed in claim 1 characterized in that the pocket is of a size and shape corresponding to that of the shank whereby a plurality of the extensions may be nested side by side to increase the width of cut of the bucket.

6. An extension as claimed in claim 1 characterized in that the pocket is of a size and shape corresponding to that of the shank whereby a plurality of the extensions may be nested side by side to increase the width of cut of the bucket, said shank and pocket being tapered whereby to produce a wedging action incident to the use of the extensions tendingto tighten the connection between them.

7. A combination with an excavator bucket, tooth receiving pockets in thesides thereof adapted to receive cutting teeth, an extension including a body, a shank carried by the body adapted to be received in each pocket to replace the tooth therein, a tooth carried by the body, and a pocket carried by the body adapted to receive a tooth of the type removed from the first mentioned pocket.

8. A combination with an excavator bucket, tooth receiving pockets in the sides thereof adapted to receive cutting teeth,-an extension including a body, a shank carried by the body adapted to be received in each pocket to replace the tooth therein, a tooth carried by the body, and a pocket carried by the body adapted to receive a tooth of the type removed from the first mentioned pocket and means for securing the rear portion of the extension body to the excavator bucket.

In testimony whereof I aflix my signature.

GEO. T. ROSSELLE. 

